Sportsmanship is a key and important value that you should try to uphold at all times, even when you're losing.
We've all been on the losing end at one stage in another in our sporting lives, and there's always a feeling that you could have done more and put up more of a fight. That said, you should never, ever do what L.A. Tenorio did as he saw his Philippines side losing to Greece at the FIBA 2014 Basketball World Cup.
As Kostas Papanikolaou walks past him, he decides that he wants to leave him, in particular, with a lasting impression of this game, so he reaches downstairs for a cheeky punch to the groin.
Via SB Nation